There is a lot going on here. The poem being read I can follow their meaning.
The animation and use of symbols here is brilliant.
This should be seen by more ppl!

First they came for the Communists,
and I didn’t speak up,
because I wasn’t a Communist.
Then they came for the Jews,
and I didn’t speak up,
because I wasn’t a Jew.
Then they came for the Catholics,
and I didn’t speak up,
because I was a Protestant.
Then they came for me,
and by that time there was no one
left to speak up for me.

Taxes? Is this the message that a reviewer would like us to believe that Ogden's poem and this animation addresses? How sad. This is exactly the kind of reasoning that this film warns us against.
Ogden makes it clear with the first line,"Into our town the Hangman came...", that the Hangman is not a citizen of this town. The film goes on to depict the shadow of the Hangman's gallows falling on the courthouse to convey a metaphorical message that lawful government is being eclipsed by fear and force. The idea that Ogden is suggesting that the state is oppressing it's citizens just isn't valid. Besides, taxes are determined by elected officials who work in exactly the type of building on which the shadow of the Hangman's gallows falls, so in fact, the opposite point can easily be made - lawful governance is actually the first victim of the Hangman when no one forces him to leave the courthouse lawn. After all, no one elected the Hangman to his job, but the citizens let him intimidate them into not voting to stop him.
The lesson I draw from "The Hangman" is to speak up and not give in to forces that coerce citizens to surrender their right to democratically police the group to which they belong. Ironically, a reviewer's attempt to diminish the power of that message by distorting it to serve instead a less democratic interpretation is behavior more suited to the Hangman himself. The only greater irony would be if none of rest of us who found such an interpretation to be cynical bothered to say so.
BTW, excellent film.

This is quite an unusual piece of work that I find very interesting. This short work of cut-scene animation; accompanied by music that fits the theme of the story is very artistic and unique. The Hangman is undoubtedly a great piece of poetry. A poem drafted into a short film that expresses the disturbing and disgusting side of man's nature - distorting Justice and certainly portrays how other human beings "feed other humans" through a "death machine". And often times, minorities of a particular community find themselves the scapegoats of the society's wrath and its urge to fulfill its vindictive desires. This piece of work is very insightful and a lesson that portrays the cruel side of humanity.

This isn't about loving to feed others to a death machine, or even intrinsically about death machines. It's about acquiescence to the state when it begins to oppress others, in the hope that it will leave the acquiescent alone.
If the poem/movie were about capital punishment, then the first person killed would have done something that is generally agreed to be wrong. But what the Hangman does is go after classes of people, each of whom (until the very last) is not in the majority -- aliens, Jews, blacks, lenders.
The democratic majority can always persuade themselves that it's just others who are hanged in this order. Were it not hanging but imprisonment, military service, confiscations of property (fines, imminent domain seizures, taxes) the principle would be the same.

Great 60's beatnik-style animation, narration and score. Indictment of capital punishment, as I read it, but perhaps more widely of discrimination and violence.